SYNTHETIC METALS
·
2016
·
IF 2.299
Qiang Zhao,Junhua Chen,Fubin Luo,Lu Shen,Ying Wang,Kun Wu,Mangeng Lu
Nanostructure of ordered polyaniline-graphene (PANI-rGO PMAS ) hybrid nanomaterials is assembled based on poly(2-methoxyaniline-5-sulfonic acid) (PMAS) functionalized reduced graphene oxide (rGO PMAS ) nanosheets. The presence of PMAS not only improves dispersibility of reduced graphene oxide nanosheets, but also plays a key role for heterogeneous nucleation of polyaniline (PANI) nanorods . The formation mechanism of ordered PANI-rGO PMAS hybrid nanomaterials was studied in details by using field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM) and ultraviolet-visible spectrophotometry (UV–vis). The conductivity of PANI-rGO PMAS hybrid with 17 wt% rGO PMAS is as high as 4480 S/m, compared with 2.93 S/m for pure PANI. The cyclic voltammetry tests indicate that, PANI-rGO PMAS containing 2 wt% rGO PMAS possesses fast response to redox reactions and excellent reversible stability. It has a high specific capacitance of 385 F g −1 at the scan rate of 10 mV s −1 with potential ranges from −0.2 to 0.8 V. This ordered polyaniline-graphene hybrid has potential applications for flexible supercapacitors, sensors, batteries, electromagnetic materials and thermoelectric materials, etc.
研究领域:
材料科学
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纳米科技
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高分子化学
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电化学
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能源材料
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
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2020
·Vol. 46
·期 13
·20810-20818
·
IF 3.83
Mengjing Liu,Sun-Wai Chiang,Xiaodong Chu,Jia Li,Lin Gan,Yanbing He,Baohua Li,Feiyu Kang,Hongda Du
Herein, oriented boron nitride (BN)/alumina (Al 2 O 3 )/polydimethylsiloxane (PDMS) composites were obtained by filler orientation due to the shear-inducing effect via 3-D printing. The oriented BN platelets acted as a rapid highway for heat transfer in the matrix and resulted in a significant increase in the thermal conductivity along the orientation direction. Extra addition of spherical Al 2 O 3 enhanced the fillers networks and resulted in the dramatic growth of slurry viscosity. This, together with filler orientation induced the synergism and provided large increases in the thermal conductivity . A high orientation degree of 90.65% and in-plane thermal conductivity of 3.64 W/(m∙K) were realized in the composites with oriented 35 wt% BN and 30 wt% Al 2 O 3 hybrid fillers. We attributed the influence of filler orientation and hybrid fillers on the thermal conductivity to the decrease of thermal interface resistance of composites and proposed possible theoretical models for the thermal conductivity enhancement mechanisms.
研究领域:
材料科学
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高分子化学
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热管理材料
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先进制造
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复合材料工程
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2017
·
IF 2.714
Jingwen Song,Kai Ma,Tifeng Jiao,Ruirui Xing,Lexin Zhang,Jingxin Zhou,Qiuming Peng
Graphene oxide (GO)-based nanocomposite films via facile and appropriate self-assembly methods have demonstrated many potential applications in wide fields. This study demonstrates a facile and clean route to prepare graphene oxide-dye composite films using Langmuir-Blodgett (LB) technique at room temperature. By electrostatic interaction between cationic dye molecules and negatively charged GO sheets as well as π-π interactions, GO-dye composite LB films were formed spontaneously. As a soft platform for dye molecules, GO sheets induce dye molecules to self-assemble and form highly ordered structures containing H-aggregates and/or J-aggregates. The morphological characterization results show the formation of GO-dye composite films with smooth and dense surfaces. And the spectral results reveal that dye molecules stack in well-organized aggregates on the surface of GO sheets corresponding to monomers in bulk solution. The present research work about GO-dye composite films by LB method may provide new clues to prepare organized composite films and demonstrate potential applications in many fields.
研究领域:
材料科学
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纳米科技
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表面化学
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胶体与界面科学
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功能薄膜
✓ 已验证
DOI
高影响因子
SCRIPTA MATERIALIA
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2020
·
IF 5.079
Feng Guo,Pengfei Wen,Bo Duan,Yao Li,Xilong Zhou,Pengcheng Zhai
Co 4 Sb 11.5 Te 0.5 hybrid composites with dual-nano inclusions (1 vol %) of SiC whiskers (SiC w ) and SiC particles (SiC p ) are prepared by spark plasma sintering . It is found that the hybrid composites exhibit further improved flexural strength and fracture toughness compared with those reinforced by SiC w or SiC p alone, indicating a striking synergistic enhancement effect. And the dimensionless figure of merit values of the hybrid composites remain nearly unchanged compared with the sample reinforced by individual inclusion. Our study provides an effective route to further improve the mechanical prosperities of thermoelectric materials .
研究领域:
材料科学
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热电材料
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复合材料
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固态物理
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无机非金属材料
✓ 已验证
DOI
高影响因子
MATERIALS LETTERS
·
2014
·
IF 2.269
Jianxiu Liu,Dafeng Zhang,Xipeng Pu,Daoyou Dong,Peiqing Cai,Hyo Jin Seo
Magnetically separable Zn 1− x Cd x S/γ-Fe 2 O 3 ( x =0–1) photocatalysts were synthesized by a one-step combustion method. The structures, morphologies, absorbance, optical and photocatalytic properties of the samples were studied by X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy , ultraviolet–visible spectrophotometry and photoluminescence . The experimental results show that the formation of hexagonal Zn 1− x Cd x S and γ-Fe 2 O 3 and the combination of them were one-pot achieved. The Cd 2+ content has a significant influence on the absorbance of visible light and fluorescence properties. The magnetic properties of samples ensure the magnetic separation by using a magnet. CdS/γ-Fe 2 O 3 shows the best photocatalytic performance compared with other samples, ascribed to its small energy band gap and matching energy band structure between CdS and γ-Fe 2 O 3 . Moreover, no obvious deterioration was observed in the stability tests.
研究领域:
材料化学
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光催化
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纳米材料
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环境功能材料
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无机合成
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Wei-fang Chen,Weipeng Lu,Sijia Zhang,Xiaobing Xie,Fei-fei He,Zai Chen
Starting with sucrose and ferrous chloride, nanoparticles of iron encapsulated in carbon structure were synthesized using a carbothermal method. The effects of carbothermal temperature, treatment time, Fe:sucrose mass ratio on the properties of the nanoscale zero-valent iron supported activated carbon were investigated. Temperatures ranged from 500°C to 1,100°C and treatment time used was 0.5, 1 and 3 h. Mass ratios of Fe and sucrose were 1:2, 1:4 and 1:8, respectively. Materials thus obtained were mostly powdered. X-ray diffraction patterns indicate that zero-valent iron was successfully produced from reduction of iron oxides. Iron was incorporated into the carbon structure. Hexachlorobenzene was employed as the target substance to test the material’s application. The optimum synthesis condition which resulted in a more than 95% HCB removal was carbothermal temperature of 700°C, treatment time of 1 h and mass ratio of Fe:sucrose of 1:4.
研究领域:
环境化学
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材料科学
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环境污染治理
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纳米材料
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环境工程
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Jishu Han,Fangxu Dai,Ying Liu,Ruiyang Zhao,Lei Wang,Shouhua Feng
The photocatalytic hydrogen production has become one of the most promising strategies to solve the energy crisis and environmental pollution. Novel CdSe/SrTiO 3 nanocomposites (average diameter ≈ 114.6 nm) with high photocatalytic activity are synthesized and used for visible light photocatalytic water splitting for hydrogen production . Through optimizing the concentration of CdSe QDs, CdSe/SrTiO 3 nanocomposites exhibit increased visible light absorption and enhanced photocatalytic hydrogen evolution efficiency compared to SrTiO 3 nanoparticles. The maximum H 2 evolution amount reaches to 3350.53 μmol in 8 h by using CdSe/SrTiO 3 -3 as catalyst. Owing to the formation of heterojunction at the interface between CdSe and SrTiO 3 , the electrochemical impedance spectrum of CdSe/SrTiO 3 -3 exhibits the smallest arc radius and the photocurrent density of CdSe/SrTiO 3 -3 reaches to 0.26 μA cm −2 . The photogenerated electrons are effectively separated and transferred and the recombination of electron-hole pairs is avoided, thus significantly improving the photocatalytic hydrogen production performance of CdSe/SrTiO 3 nanocomposites.
研究领域:
材料科学
·
物理化学
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纳米催化
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能源材料
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光催化
✓ 已验证
DOI
高影响因子
MACROMOLECULAR MATERIALS AND ENGINEERING
·
2019
·Vol. 304
·期 4
·1800689
·
IF 3.038
Jie Mei,Weifeng Liu,Jinhao Huang,Xueqing Qiu
It is still a great challenge to prepare lignin/polyolefin composites with good strength and toughness. Inspired by the energy sacrificial mechanism from biomaterials, dynamic hydrogen bonds (H-bonds) are incorporated into the lignin/ethylene-propylene-diene monomer (EPDM) composite system to improve the interfacial interactions between lignin and EPDM. Such H-bonding interactions are demonstrated to be able to simultaneously improve the modulus, strength, and toughness of lignin/EPDM composites without sacrificing the extensibility. This work provides a facile method for the high-valued utilization of lignin in the preparation of high-performance elastomer composites using bio-renewable resources as reinforcing agent.
研究领域:
高分子材料
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复合材料科学
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生物基聚合物
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功能材料
·
可持续材料
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Zhenpeng Zhu,Zishan Sun,Ziying Guo,Xinguo Zhang,Zhan-chao Wu
A core-shell nanocomposite based on carbon dots (CD)/Rhodamine B (RhB) is realized by a facile method. The composite particles show spherical shape with narrow size distribution, non-agglomeration and smooth surface. The as-obtained nanocomposite shows the characteristic dual-emission of thermal-stable CD blue emission and thermal-sensitive RhB red emission at a single excitation wavelength. The fluorescence intensity ratio (FIR) is found to have a good linear relationship ( R 2 > 0.993) with temperature, while the corresponding maximum absolute and relative sensitivity is 2.01% K −1 and 1.39% K −1 in range of 283–373 K. The research provides a simple approach to create novel dual-emitting nanocomposites for temperature sensing application in micron-scale and biological field.
研究领域:
分析化学
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纳米生物技术
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生物医学工程
·
分子成像
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生物传感
✓ 已验证
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2016
·
IF 2.421
Changqing Fang,Xin Yu,Ruien Yu,Pei Liu,Xiaoting Qiao
Isocyanate modified asphalt samples were got by adding quantitative isocyanate into the base asphalt. Isocyanate and nano particles composite modified asphalt samples were produced by adding quantitative isocyanate and three different kinds of inorganic nanoparticles (Silicon dioxide, Titanium dioxide, Zinc oxide) into the base asphalt respectively. Isocyanate modified asphalt, isocyanate and nanoparticles composite modified asphalt were characterized by taking physical tests, SEM, fluorescence microscopy, TG and FTIR tests, which demonstrated that the high and low temperature performance of isocyanate and nano particles composite modified asphalt had been improved effectively. From the microscopic view, the modification of the base asphalt was very significant. Results also indicated that the temperature sensitivity of composite modified asphalt had been decreased. Meanwhile, the thermal stability had been improved when compared with the base asphalt and isocyanate modified asphalt.
研究领域:
材料科学
·
道路工程
·
高分子化学
·
纳米技术
·
应用化学
✓ 已验证
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2016
·Vol. 122
·期 7
·678
·
IF 1.444
Yin Xin,Song Lixin,Xie Xueyao,Zhou Yangyang,Guan Yingli,Xiong Jie
The flexible ZrO 2 /C composite nanofibrous film was fabricated by electrospinning and thermal treatment. Field-emission scanning electron microscopy, transmission electron microscopy, X-ray diffractometer, and Fourier transform infrared spectra were used to characterize the morphology and microstructure of the ZrO 2 /C composite nanofibrous film. The ZrO 2 /C nanofibers exhibited rough surface and had the average diameter of about 230 ± 35 nm. And the ZrO 2 nanoparticles were incorporated in carbon matrix and in tetragonal and monoclinic. The flexural property of the ZrO 2 /C composite nanofibrous film was investigated in detail. The results showed that the flexural property of the nanofibrous film was greatly improved with addition of the ZrO 2 nanoparticles. Besides, with the increase of the contents of ZrO 2 nanoparticles, the flexural modulus of the nanofibrous film decreased, reached a lowest value, and then increased. The lowest flexural modulus of the ZrO 2 /C composite nanofibrous film in precursor concentration of 7.0 wt% was 8.55 ± 0.06 MPa.
研究领域:
材料科学
·
纳米科技
·
复合材料
·
功能材料
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Yurou Feng,Amatjan Sawut,Rena Simayi,Xieraili Maimaitiyiming,Xueying Jiao
With the advancement of science and technology, the issue of wastewater pollution has escalated, necessitating urgent attention to wastewater treatment . In this study, a highly efficient adsorbent for Cu 2+ was successfully synthesized through in situ self-assembly using Ca 2+ as the cross-linking agent in ZIF-8@ALG composite hydrogel. The results demonstrated that the incorporation of Ca 2+ as the cross-linker enhanced both adsorption capacity and swelling properties of ZIF-8@ALG composite hydrogel. Adsorption performance evaluation revealed that the hydrogel followed pseudo-second-order kinetic model for Cu 2+ adsorption and Freundlich isotherm model with a theoretical maximum adsorption capacity of 309.57 m g −1 . Thermodynamic analysis indicated that Cu 2+ adsorption onto the hydrogel occurred spontaneously with heat absorption. Furthermore, excellent reusability was observed after five cycles of usage without significant loss in adsorption efficiency. Overall, these findings highlight the potential application of ZIF-8@ALG composite hydrogel as an effective solution for wastewater remediation and recovery of heavy metal ions.
研究领域:
环境科学
·
材料科学
·
化学工程
·
环境污染治理
·
重金属去除
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）